Lower Bound of Image Correlation Coefficient as a Measure of Image Quality

Bongsoon KANG  Hoongee YANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E81-B   No.4   pp.811-813
Publication Date: 1998/04/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
Keyword: 
correlation,  beamforming,  phased array,  radio camera,  DSA,  ABF,  

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Summary: 
This letter derives the theoretical lower bound on image correlation coefficient that judges the extent of image degradation. It is shown that the correlation coefficient depends on phase-error variance in antenna aperture domain. Thereby, one can predict image quality before image formation. The theoretical bound is verified by experimental data where the dominant scatterer algorithm (DSA) is used for phase synchronization.